Why is my Ford Fiesta parking sensors not working?

When the parking sensors are not working in Your Ford Fiesta it is usually caused by either a damaged sensor or damaged wiring to the sensor. The parking sensors on Your car are exposed to all the elements and if they get d***y or damaged they will not work properly. The first thing You should do is clean them off and inspect them for any signs of serious damage. If they are okay then the next thing You should check is the wiring to them. If any of the wiring is loose or frayed it will also not let the parking sensors work properly. This will result in the vehicle not making any noise when You get near an item.